Ring and traveler for use in certain doubling and like operations upon yarns



Jan. 21, 1930. J. ANCROFT 1,744,202

RING AN TRAVELE 0 SE IN CERTAIN DOUBLING ENS LIKE OPER ONS UPON YA Filed July 1929 Patented Jan. 21, 1930 UNITED STATES JAMES BANCROFT, 0F ACCRINGTON, ENGLA BULLOUGH LIMITED, OF ACCR ND, ASSIGNOR OF ONE-HALF TO HOWARD & INGTON, LANCASTER, ENGLAND RING- AND TRAVELER FOR USE IN CERTAIN DOUBLING AND LIKE OPERATIONS UPON YARNS Application filed July 27, 1929, Serial No. 381,469, and in Great Britain August 29, 1928.

This invention relates to rings and travelers very suitable for use in yarn doubling operations when the yarn is required to pass-off a bobbin or yarn container, for example in the formation of cable cord in those cases where the yarn passes off one set of bobbins to the traveler in the first twisting part of the operation. But the invention is also useful for application to ordinary doubling or spinning frames for yarn operations therein.

The object of the invention is to provide a ring and traveler adapted thereto whereby the tendency of the latter to tilt or be unduly displaced when moving round said ring is largely removed as-said tilting tendency in certain cases introduces drag of an undesirable character. By my arrangement there is attained a constant drag with a minimum of friction, on account of the manner and direction in which the yarn is drawn oil or through the traveler as herein arranged. The traveler adapted according to my invention enables the yarn passing therethrough to have greater freedom to adapt itself to the changing directions in which the untwisted strands are coming from the bobbin concerned.

Said ring according to my invention is in double-channel form and constructed as an integral unit, so as to be complete in said form when removed from the ring rail for supporting it. The ring is substantially of H- shape in section, a projecting lip being provided on its upper outer edge whereby it is supported by the ring rail. Said ring rail is external of said ring, and forms the sole sup port of the latter.

The traveler which spans over both upper and lower channels of the ring named, has single extremities which are capable of entering the channels, or so as to project into their respective channels, as herein illustrated.

WVith reference to the accompanying drawings, Fig. 1 is a plan view of a ring according to my invention, the traveler therefor and a yarn-supplied bobbin on a spindle being also indicated. For cable cord frames said yarn would be drawn from said bobbin and to and through the traveler. In the case of ordinary ring spinning frames, said yarn would be wound on to the bobbin as understood.

Fig. 2 is a sectional elevation of a portion of Fig. 1 showing the traveler placed in a position relatively to the ring in order to illustrate the possible space between traveler and ring for allowing the yarn greater freedom in said traveler.

In Figs. 3 and 4;, and similar to Fig. 2, various possible positions of the traveler are illustrated.

Fig. 5 shows a modified form of ring referred to.

Fig. 6 shows on an enlarged scale details in the foregoing figures with regard to the ring.

In Fig. l a is a spindle, b the top end of a bobbin thereon, and 0 the yarn, which latter is unwound from said bobbin or wound thereon as the case may be, and passes through a traveler such as (Z in either operation. 0 is the ring according to our invention for said traveler.

In Fig. 2 the yarn c is indicated, but in the remaining figures is omitted. The ring 6 aforesaid is shape in section and is channel manner at h elusive, and in Fig. 6.

In said Fig. 3 the upper extremity of the traveler (Z is shown tending to abut against the inner face of the outer wall of channel It and in Fig. 4 the lower extremity of said traveler is shown abutting against the inner face of the outer wall of channel 2', thus indicating the limits of movement or tilting of the traveler named. The conditions of Fig. 3' or Fig. 4E or those approaching the same might occur when due to the action of centrifugal force for high speeds of the traveler. It will be seen that not only is tilting tendency kept within reasonable limits by the means de scribed, but that the manner in which the traveler is made to engage the channels of the ring results in ample space for movement of the yarn being provided in the traveler in the vertical plane shown, which space is restricted in the case of travelers and rings for ordinary spinning frames as well as for ordinary wet doubling frames.

Fig. 5 indicates that variation in the form after being twisted,

substantially H formed in doubleand 2' in Figs. 2 to 4 inof section of the ring may be possible without impairing the efiectiveness thereof. In the example chosen the lower and inverted channel marked 0 is of less width than the upper channel h, and also the axes of the two channels are not in alignment, the walls of the lower channel being of unequal thickness. Alternatively, a similar arrangement could be made as regards the upper channel, such as by thickening either of the walls involved.

In the case of Fig. 5 referred to, the tilting of the traveler in the one direction would be of different extent to that in the other.

The ring is provided with a projecting lip m on its upper outer edge whereby it is supported by the ring rail.

I claim:

For use in yarn doubling and other twisting operations, and in combination, a traveler-ring having an upper channel and a lower and inverted one below the first-named, for carrying the traveler, said channel parts integral with the remainder of the ring, a ringrail external of said ring and forming the sole support thereof, a projecting lip round the upper edge of said ring for support at said rail, and a traveler with single extremities, one of which passes into the upper channel named, and the other into the lower channel of the ring, as herein set forth.

JAMES BANCROFT. 

